Brain Dialysate
Brain Dialysate - Related Videos
06:28
Isolating Immune Cells from Mouse Brain and Skull
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Cited by 1 •
2024
To investigate the immune response to brain disorders, one common approach is to analyze changes in immune cells. Here, two simple and effective protocols are provided for isolating immune cells from murine brain tissue and skull bone marrow.
09:23
Improved Method for the Establishment of an In Vitro Blood-Brain Barrier Model Based on Porcine Brain Endothelial Cells
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Cited by 31 •
2017
The aim of the protocol is to present an optimized procedure for the establishment of an in vitro blood-brain barrier (BBB) model based on primary porcine brain endothelial cells (pBECs). The model shows high reproducibility, high tightness, and is suitable for studies of transport and intracellular trafficking in drug discovery.
11:13
Ex Vivo Optogenetic Dissection of Fear Circuits in Brain Slices
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Cited by 8 •
2016
Optogenetic approaches are widely used to manipulate neural activity and assess the consequences for brain function. Here, a technique is outlined that upon in vivo expression of the optical activator Channelrhodopsin, allows for ex vivo analysis of synaptic properties of specific long range and local neural connections in fear-related circuits.
10:37
The Split Brain
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2023
Source: Laboratories of Jonas T. Kaplan and Sarah I. Gimbel—University of Southern California The study of how damage to the brain affects cognitive functioning has historically been one of the most important tools for cognitive neuroscience. While the brain is one of the most well protected parts of the body, there are many events that can affect the functioning of the brain. Vascular issues, tumors, degenerative diseases, infections, blunt force traumas, and neurosurgery are just some of the...
12:15
Double Fluorescence in situ Hybridization in Fresh Brain Sections
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Cited by 7 •
2010
This protocol involves a non-radioactive in-situ hybridization procedure that enables the simultaneous identification of two transcript species, at a single cell resolution, in thin sections of the vertebrate brain.
FAQs
The semipermeable membrane acts as a selective exchange boundary. Small molecules move between brain extracellular fluid and the perfusing physiological solution according to concentration gradients, allowing them to enter the collected sample. Because larger components are generally excluded, the resulting chemistry emphasizes soluble, low-molecular-size signals rather than intact cellular material.
Excluding cells and most proteins helps focus analysis on soluble extracellular chemistry. This distinction matters because the sample is suited to tracking neurotransmitters, metabolites, and other soluble biomarkers, but it does not represent every substance or structure present in brain tissue. Interpretation therefore centers on extracellular chemical changes rather than whole-tissue composition.
The physiological solution provides the liquid stream that passes through the probe while exchange occurs across the membrane. As small molecules diffuse along their gradients, they are carried away in this stream for collection and analysis. The arrangement links membrane selectivity with a recoverable sample of local brain chemistry.
Sampling at a defined brain location makes the measurements spatially localized, while collecting material over successive periods provides temporal information. This combination lets investigators relate changes in extracellular neurotransmitters, metabolites, or other soluble biomarkers to neural activity, metabolism, injury, drug exposure, or neurological disease without treating the entire brain as chemically uniform.
A basic workflow places a probe in brain tissue, perfuses it with a physiological solution, allows small molecules to cross the semipermeable membrane, and collects the resulting dialysate. The collected material is then analyzed for selected chemical constituents. Each stage preserves the link between local extracellular chemistry and the measured sample.
Analysis can target neurotransmitters, metabolites, and other soluble biomarkers present in the extracellular sample. These measurements can reveal chemical changes associated with neural activity and metabolism, while also supporting investigation of injury, drug exposure, and neurological disease. The useful output is therefore a chemical profile that is both localized and time-resolved.
In neuroscience, Brain dialysate is useful when researchers need to follow changing chemistry in brain tissue under different conditions. The approach can compare normal function with injury, drug exposure, or disease-related states by examining extracellular chemical signals. Its value comes from connecting these conditions to measured changes in neurotransmitters, metabolites, and related biomarkers.